Experimental and numerical study of maximum efficiency vortex finder insertion depth of a Stairmand cyclone

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2024-10-18 DOI:10.1016/j.partic.2024.10.004

Shiwei Yuan , Guogang Sun , Liangce Xiao , Jianchen Sun , Zhen Qian , Gang Cao

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Abstract

The vortex finder is essential in cyclone separators, significantly affecting separation performance via its diameter and insertion depth. The current study shows that as the insertion depth of the vortex finder increases, the separation efficiency initially increases and then decreases, and there exists a maximum point with which the corresponding insertion depth is the maximum efficiency insertion depth (S_MEID). However, there are inconsistent conclusions in the existing literature regarding the maximum efficiency insertion depth and a lack of explanation for the flow field mechanism at the maximum efficiency insertion depth. This study examines the Stairmand type cyclone using 13 μm silicon micro-powder, employing numerical simulation and cold mold experiments to explore the effects of the vortex finder's insertion depth and diameter on separation performance and flow field. The results indicate that the insertion depth has minimal impact on pressure drop. The maximum efficiency insertion depth of the vortex finder decreases as the diameter decreases and is independent of this insertion depth with respect to the inlet velocity. Analysis of the flow field reveals that the maximum efficiency insertion depth is essentially the result of a "competitive and synergistic" mechanism between the annular space separation capability and the separation space separation capability.

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斯泰尔曼德旋风分离器最大效率涡流探测器插入深度的实验和数值研究

旋风分离器中的涡流探头至关重要，其直径和插入深度对分离性能有重大影响。目前的研究表明，随着涡流探查器插入深度的增加，分离效率会先增加后降低，存在一个最大点，其对应的插入深度就是最大效率插入深度（SMEID）。然而，现有文献对最大效率插入深度的结论并不一致，对最大效率插入深度的流场机制也缺乏解释。本研究使用 13 μm 硅微粉对 Stairmand 型旋流器进行了研究，通过数值模拟和冷模实验，探讨了涡流探测器的插入深度和直径对分离性能和流场的影响。结果表明，插入深度对压降的影响很小。涡流探查器的最大效率插入深度随着直径的减小而减小，并且与入口速度无关。流场分析表明，最大效率插入深度基本上是环形空间分离能力和分离空间分离能力之间 "竞争和协同 "机制的结果。

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.